I did a little digging and found this:
Rudistor Coriolan 2 are very high qualities, is using resistors Mills and Audionote, capacitors Howland. Using very high grade compostnents throughout. When listen in Stax, have "heaven" experiences, wide sound of concerted hall, but sound also inmate like you there. Sennheiser Orpheus, "the grate", sound are nature, very "reality", not trying, lesseffort, like Analogous. Only sad does not work in Grado dynamic, Coriolan only in Stax and Orpheus. Built is very (as Rudistor always) good, as much as tower of Pisa. Meters "old fashion" high qualities valves amp. For valves sound better, need "tubes tied" damper rings made high quality Italian by Tomy Vasec.